# Kerodon

$\Newextarrow{\xRightarrow}{5,5}{0x21D2}$

# 4 Retired Tags

In this chapter we collect tags which have retired for some reason. They can still be referenced, but are no longer part of the main text.

## Structure

• Section 4.1: Expanded Tags
• Section 4.2: Tags without Context
• Section 4.3: Obsolete Constructions
• Section 4.4: Reclassified Tags
• Section 4.5: Retired Subsections
• Subsection 4.5.1: The Universal Property of $\mathrm{h} \mathit{\operatorname{\mathcal{C}}}$